The first strike is Number #1 - the caveman strike from the caveman chamber - the natural strike of the human animal.
The 2nd strike is number #2 from the backhand chamber.
There are only these two chambers - all angle strikes are delivered from these, like in tennis - the forehand and the backhand.
With 2 exceptions.
The number #5 thrust is delivered from a low hip chamber.
The tenchi strike in kenjutsu - a two handed strike which is delivered from jodan no kamae. This strike itself is neither an 8 or 11 - it is tenchi, unique to kenjutsu.
Angles are based on geometry:
+ X .
x covers the diagonal strikes - 1, 2, 9 and 10
+ covers the vertical and horizontal strikes - 3, 4, 8, 11 and 12
. is the thrusts - 5, 6, and 7
This is the number system used in Cabales serrada, and the one we adopted for STMA.
An appendix strike is the #13, which is a 12 delivered behind.
A 12 is all vertical up strikes - a kingeri, uppercut, elbow. It applies to weapons as well.
(comic buffs will know that Judge Dredd KO'd Batman with a stick 12 in Judgement Over Gotham.)
A 13 is a mule kick, groin slap or back up elbow.